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Larry Richwine
Director of Technical Services
6705 E 900 N, Brownsburg, IN 46112
PH 317-852-0630 
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To order a NTPA rulebook, order online, call the NTPA office at 614-436-1761 or mail $6 plus $2 shipping and handling to WPI/NTPA, 6155-B Huntley Rd. Columbus, OH 43229.

 

New NTPA Rules for 2022: The following items were approved by the WPI/NTPA Joint Executive Board at the Fall Meeting on September 19, 2021.

Safety

  • All helmets must be Snell 2015 or newer

Pull Off

  • Eliminate rules 8 and 9 on pg. 88 related to pulloff per proposed agenda item

Diesel Fuel

  • Dielectric constant reading increased to 150 / 13.4 based on meter used.

Limited Pro Stock

  • Steel billet cylinder head(s) allowed.

Classic Super Stock

  • Classic Super Stock class now a recognized Regional National class.

Limited Light Super Stock

  • Engine
    1. Maximum of 410 cubic inches for single turbo charged diesel engines, intercoolers allowed. This engine combination can run a maximum of (1) 3x4 turbo with MAF enhancements, 0.200 MAF enhancements. No forward facing MAF OR (1) 3.4x4 smooth bore turbo.

    2. Maximum of 470 cubic inches for single turbo charged diesel engines. No intercoolers allowed. (The 478 Hercules engine will be legal to run in its factory combination 0% variance on CID). This engine combination can run a maximum of one (1) 3.4 x 4 smooth bore turbo OR (1) 3x4 turbo with MAF enhancement of 0.200 MAF enhancement. No forward facing MAF.

  • Front Axle Suspension – approved for this class.

Pro Farm

  • Turbocharger – require 3” smooth bore (intake and exhaust) turbo.
  • Rule 5 - 3” intake and exhaust slug option eliminated.

Mini Rod

  • Stabilizer Bars: Center of stabilizer bar pad must extend 2” behind tire.

Light Unlimited

  • Two-engine limit removed from class rules.

 

Rule Reminder:

Due to a recent series of Incidents, the block plate and belhousing mounting rule will be strictly enforced to the current NTPA rule listed below and the SFI mounting requirements per the manufacturer.

Page 19 of the 2020 NTPA Rulebook letter i, reads:

    1. All automotive-type engines with bellhousings and clutch will run a full block plate, either a unit commercially available, or minimum 3/16-inch steel, or minimum 1/4-inch aluminum with (6) 3/8-inch grade #5 bolts evenly spaced on the bottom half of the bellhousing.
      Bellhousing must be fastened with a minimum 3/8" grade #5 bolt installed in each bellhousing mounting hole as manufactured. All bellhousing mounting bolts must pass through block plate or at least fasten block plate to belhousing. 

 

 

Rule Clarification: The rule pertaining to the containment device on a multi turbo diesel truck or tractor has been changed to read:

C. Turbocharger Containment

Note: This rule only applies to turbocharger(s) with larger than 3 inch diameter inlet

1. Diesel Engines:

Any single turbocharger or the turbocharger mounted directly to exhaust manifold on a multi turbo setup must have a Kevlar lined containment device (bag or blanket) that completely encloses the intake compressor housing. Bag or blanket used must be commercially available from a NTPA approved manufacturer.
Note: Containment device cannot be homemade.

Attention NTPA Competitors, Officials, and Fans: 2021 NTPA Pulling Rules Addendum
The 2021 NTPA Pulling Rules Addendum lists all new and revised rules that have been approved and implemented since the printing of the 2020 rulebook. Members will receive this document in their February membership mailing with their other materials. The 2021 Addendum will also be included with 2020 rulebooks purchased from ShopNTPA.com.

Attention NTPA Competitors: The following items were considered and approved by the WPI/NTPA Executive Boards for the 2021 season.

    1. Heavy Super Stock Diesel GN/SN: Limited to a maximum 540 cu.in. for all turbocharger configurations.
    2. Open Super Stock: The following rules have been added to current rules.
      1. Maximum 650 cu.in.
      2. Inline or V configuration engines only.
      3. OEM block or aftermarket replica must be from an agricultural machine application.
      4. Engine brand not required to match brand of sheet metal used.
    3. Light Limited Super Stock: Adopted as an NTPA sanctioned class for regional national competition.

Light Limited Super Stock Rules: All OEM chassis Pro Stock rules, including shielding, safety and SFI requirements, apply to this class plus the following rules:

Weight

  • Tractor weight will be 6,250 lbs.

Engine

    1. Engine must match brand of tractor. Engine crankcase, block, and cylinder head must be of same manufacturer or factory replacement and can be used in any agricultural transmission and rear end that used that brand of engine or through its company mergers used that brand of engine.
    2. Must be OEM engine block, no Billet steel or aluminum blocks.
    3. Rear of engine must be in stock location for make and model of rear end and transmission housing, with a maximum tolerance of a 1” adapter plate.
    4. No V-8 Engines permitted.
    5. No Overhead cams allowed.
    6. Maximum allowed “P” pump. Only one plunger per cylinder allowed.
    7. No electronically controlled fuel system allowed.
    8. No secondary source of fuel (liquid or gas) or oxygen enhancer allowed.
    9. Water injection allowed.
    10. Computer can only be used for data acquisition, may not be able to control engine timing, or fuel delivery. No traction control.
    11. Maximum of 315 cubic inches for twin turbocharged diesel engines with Intercoolers. (Turbo(s) must be staged.) This engine combination can run a maximum of two (2) 3 x 4 smooth bore turbo(s). No MAF enhancement.
    12. Maximum of 360 cubic inches for twin turbocharged diesel engines and no intercooler or after cooler allowed. (Turbo(s) must be staged.) This engine combination can run a maximum of two (2) 3 x 4 smooth bore turbo(s). No MAF enhancement.
    13. Maximum of 410 cubic inches for single turbocharged diesel engines. Intercoolers allowed. This engine combination can run a maximum of one (1) 3 x 4 turbo with MAF enhancement. 0.200 MAF enhancements. No forward-facing MAF.
    14. Maximum of 470 cubic inches for single turbocharged diesel engines. No intercoolers allowed. (The 478 cu. in. Hercules engine will be legal to run in its factory combination 0% variance on CID.) This engine combination can run a maximum of one (1) 3.4 x 4 smooth bore turbo.
    15. Alcohol Engine maximum of 370 cubic inches for single turbo charged alcohol engines. No intercoolers allowed. This engine combination can run a maximum of one (1) smooth bore 3 x 4 turbo.

Turbo Restrictions

    1. Diesel engines that will be allowed to run a 3.4 x 4 smooth bore turbo, the compressor wheel must protrude into the housing 1/8" and the compressor wheel must measure no larger then 3.400” at the face of the wheel.
    2. No superchargers allowed.

Cylinder Heads

    1. One spark plug per cylinder ONLY.
    2. Maximum of 2 valves per cylinder. Valves must maintain the factory angle, lateral movement of valves only. Valves must seat in the bottom of the OEM head on all 6-cylinder engines.
    3. OEM cylinder head for that brand and model engine. No billet or re-cast cylinder heads allowed.
    4. Maximum of one (1) deck plate will be permitted between the top of the block and the bottom of the cylinder head, with a maximum thickness of 1-1/8".

Chassis

    1. Maximum length 13 feet measured from center of rear axle to forward most point, excluding tow hook. Maximum wheelbase 114”.
    2. No type of front end suspension allowed, swivel axle front ends will be accepted.
    3. All housings must stay in place, bolted ridged in all other chassis.
    4. Auxiliary transmission will be permitted.

Tires

  • Maximum tire size 30.5 x 32, Minimum tire size 24.5 x 32.

General Rules:

  • Safety – Turbochargers – all divisions
    1. Intake Compressor Wheels – No turbocharger compressor wheel(s) may be visible through hood or side shield on either side of vehicle. Any visible inlet compressor opening must face forward.
    2. Exhaust Turbine Outlet – 2 bolts, minimum 1/2” diameter, grade 5 only, must be installed in a cross pattern as close to turbine exhaust wheel as possible.
    3. Turbocharger Containment
      • Note: This rule only applies to turbocharger(s) with larger than 3" diameter inlet
      1. Diesel Engines:
        • Any single turbocharger or top turbocharger(s) on a multi turbo setup must have a Kevlar lined containment device (bag or blanket) that completely encloses the intake compressor housing. Bag or blanket used must be commercially available from a NTPA approved manufacturer.
          • Note: Containment device cannot be homemade.
      2. Alcohol Engines:
        • Any single turbo or the top turbocharger(s) on a multi-turbo setup must have a minimum of 1/8” cable wrapped around turbo. Cable must be wrapped at least two revolutions capturing both turbocharger housings. Cable must be clamped by a minimum of two clamps at splice or metal collars around intake housing with attaching 1/8” cables to exhaust housing. Turbocharger containment device (bag or blanket) is an acceptable option in place of cable if applied as required under diesel engine turbo blanket or bag rules.

     

       

    Attention all pullers: Note the following clarifications/updated wording to General Rules (2020 Pulling Rules, page 23) effective immediately:  

    Rule 4 now reads:

    4. The following rule will apply to all divisions that use solid driveline shields over 16 inches in length:

          • Note: this also applies to Mini Rod division and the intermediate shaft on FWD.

    All driveline shield components must be tethered on each end by two opposing restraints. Tethers must attach at 180 degrees of each other and a minimum of 3” and a maximum of 6” from each end of each driveline shield component.

    Tether to be constructed of a minimum of 2” wide by 1/8” thick nylon or polyester strap. One end of tether must attach to one side of the chassis, then go around the driveline shield, then attach to the other side of the chassis. Tether must be attached to chassis by a minimum of one 3/8” grade 5 bolt with a grommet on each side or wrap around the chassis and use a buckle to fasten it to itself.

                • Note: FWD drivelines that use driveshaft hoops must use same tether configuration to be attached to main or common hoop holder between chassis and hoop assembly.

     

    Attention PSD 4x4 3.6 Competitors

    Revision to rule C.1 page 71 under 3.6 diesel to allow billet blocks and heads, delete the last two lines and change to (Engine must be OEM replacement of its replica. A replica to be considered must retain stock bore spacing and operate with the stock crankshaft for the model without alterations for chassis mounting.) and delete rule C .2

     

    Attention: Competitors in Turbocharged Divisions/Pro Stock: The following rules are effective immediately:

                  1. Titanium compressor or exhaust wheels are not allowed in any/all NTPA classes that use turbos at all levels of competition.
                  2. Heavy Pro Stock tractors are limited to the following:
                    • Exhaust limited to 6-inch diameter exhaust to be measured at the face of the wheel.
                    • Exhaust wheel must protrude into the 6-inch bore by 0.125” minimum.
                    • All exhaust must exit the 6-inch bore.

    Attention Light Super Stock competitors regarding the 2020 Cloverdale, IN event:

    Due to the concerns of competitors about restricting the exhaust and mounting of the exhaust extension tube, the program has been scrubbed. The Cloverdale event will not be running the Light SS class.

    Items/rule changes that go in effect for the 2020 season

    General rules:

                  1. 2019 rulebook pg 18, letter C, number 12 b, now reads:
                    All automotive-type engines with bellhousings and clutch will run a full block plate, either a unit commercially available, or minimum 3/16-inch steel, or minimum 1/4-inch aluminum with (6) 3/8-inch Grade #5 bolts evenly spaced on the bottom of the bellhousing. Bellhousing must be fastened with a minimum 3/8" grade #5 bolt installed in each bellhousing mounting hole as manufactured. All bellhousing mounting bolts must pass through block plate or at least fasten block plate to bellhousing.”
                  2. 2019 rulebook pg 24, letter G now reads:
                    Automotive engine is any engine or its replica available in a passenger car. Maximum of (8) cylinders. Maximum supercharger size: 14-71, 19-inch rotor case length, 11.25-inch rotor case width. Helix restricted to a maximum rotor spiral of 6.5 degrees per inch of rotor length. Variable multi-speed supercharger devices prohibited.”
                  3. Add to 2019 rulebook pg 41, letter R:
                    Pro Charger allowed in all divisions with a limit of 140 mm inlet, at 45% overdrive maximum.
                  4. Add to 2019 rulebook pg 25, letter G, number 5 and pg 41, letter R:
                    “Screw-type superchargers are only allowed in the Unlimited (light and heavy) class. Overdrive limited to 125%.”

    Mini Rods:

      1. 2019 rulebook pg 60, letter A, number 1 now reads:
        Automotive engine or its replica available in a passenger car limited to a maximum of 575 cubic inches blown with a maximum 4.900-inch centerline bore spacing or 650 cu. in. naturally aspirated or one gas turbine with an 1,800-hp limit for all National levels of pulling.
      2. Add to 2019 rulebook pg 63 new letter J to read:
        At Super National events in Mini Rod division, no vehicles equipped with small block (blown or otherwise) or naturally aspirated engines (regardless of size) or with rear tires smaller than 18.4 x 16.1 are allowed to enter and run.”

    TWD Trucks

        1. Add to 2019 rulebook pg 76, letter F, number 3, new letter b:
          Prior to competition, a TWD must be equipped with an NTPA-approved assembly that will accept a wire tie-type adjustment lock seal. This seal will be applied and secured at the time of drawbar measurement and inspection. The system must be designed so that the seal prevents the drawbar from further adjustment in any direction. (details and drawing will be in 2020 rulebook)

    Contest Operations:

          1. 2019 rulebook pg 88, letter E number 7 now reads:
            If a session is cancelled more than 24 hours prior to start time at GN/SN or 3 hours at RN/state level, no points will be given for that session.”

    Pulloffs:

    2019 Rule pg 87 letter D, number 1 & 2 now reads:

                1. At all NTPA-sanctioned events, (all levels) the maximum measurable distance will be 350 feet. Length/distance may be less as determined by that event’s insurance application and as verified by NTPA.
                2. The boundary lines at all levels will extend to 350 feet.”

    Tech Questions and Answers

    Mini Rod question

    Question:

    Hey Richwine, Did the Mini Rod trans mounting rules change after Bowling Green?

    Answer:

    No, nothing changed yet. The number of bolts may change for 2022 but, we will finish the 2021 season same as in the past.

    Pulloffs at Bowling Green

    Question:

    Mr. Richwine,

     

    Will there be pulloffs at BG this year? I've noticed that you havent had pulloffs at any events this season.

    Answer:

    Yes, there will be pulloffs if they go past 350 feet. The NTPA rulebook allows for a max distance of 350' I realize we've exceeded that distance at several events but there's not really enough "runoff" room past 350 here at Bowling Green to allow it. The pullers will be red flagged if they go past 350 and will be required to come back for a pulloff. 

    Turbo Blanket

    Question:

    Can I run if I don’t have a turbo blanket but have it ordered?
    Also, can I build a steel shield around my compressor housing instead of buying a blanket?

    Answer:

    No, you are required to have a Kevlar blanket around you “high pressure” or last turbocharger’s compressor housing in a multi turbo setup. 

    Also No, a steel cover instead of a blanket will not contain the fragments as well as a properly installed blanket.

    If you show up at a NTPA event without a blanket you will have to borrow one or just not pull.

    Note: A turbo blanket is only required in classes that allow a turbo inlet larger than 3 inches.

    Turbo measurement

    Question:

    Mr. Richwine, I’m new to NTPA, how do you guys measure the turbo? I say that the wheel where it sticks thru the housing should be 3” and everybody tells me I wrong it’s the housing.

    Answer:

    Sorry, they're correct and you’re wrong. When NTPA first started measuring the Super Farm class and actually made them tear the turbo down to be measured and sealed  we set the president of measuring the bore of the housing at the face of the wheel like the rules state.

    We measure several different classes now and they’re all measured the same way. We use a slug or a  “Go /No Go” gauge. Sounds like if measured at a NTPA event that your turbo will not pass.

    Light Limited SS

    Question:

    Mr. Richwine,

    Are the LLSS rules set in stone? What about the WTPA tractors that don't fit the rules you published? Are you gona allow front suspension?

    Answer:

    The rules that are posted are final and in place for 2021. I suggest that any changes you or any group wish to make be subbmitted for the September meetings of 2021. If they are adopted, they would be in effect for the 2022 season.

    Diesel Fuel rule for 2021

    Question:

    Hey Mr. Larry,

    Did the NTPA raise their diesel fuel spec like the other guys did?

    Answer:

    No, its still at a max number of 100 for 2021.

    Cables around the engine

    Question:

    Mr. Richwine, My engine builder wants me to run 3-4 cables around my engine after the Light Pro explosion at a non sanctioned event this summer, can I do that?

    Answer:

    No, only one cable is required or allowed around in line engines in NTPA competition. I understand your engine builders concern but, years ago when the cables were first required we required two cables. We found that only contained the explosion enough to make smaller pieces fly. The cables job is to flip the assembly away from the driver. Everyone always says "but the cable broke" and thats true, but, before it breakes or pulls out of it clamps it does the job as intended.

    If you come to a NTPA event with more than one cable on your engine you will be told to take all the extra ones off before you're allowed to run unless you have a Moline or case, then they require a cable for each head.

     

    Super Tech

    Question:

    Richwine are you doing "Super Tech" at Ft Recovery?

    Answer:

    Yes on Saturday from 11am - 2PM on Mini Rods and Unlimited only

    Water test

    Question:

    Hey Richwine, I hear that the Super Farm pullers had trouble in Rockwell passing the new water test you have. Is that true? what the heck are you doing?

    Answer:

    NTPA does have a new test but, it's no different that PPL's, so if your water will pass there, it will pass here.

     

    MSD 600 CDI

    Question:

    Larry,

    Is the MSD 600 CDI unit legal on my mini rod for NTPA competition?

    Answer:

    The Msd 600 cdi by definition of the timing control rule is a legal component when used as only an energy provider for individual coil packs. It only becomes illegal if an external controller is used in conjunction with the 600 cdi in order to adjust ignition timing during a competition run.

    Rain out rules

    Question:

    Mr. Richwine,

    Please explain how a “Rain Out” works. When can the promoter call it off where I don’t have to show up to get rain points etc. I’ve heard a bunch of different versions of what should or has happened.

    Answer:

    Page 88 of the 2019 NTPA rulebook under letter E Inclement Weather states:

    #7. If a session is cancelled more than 24 hours prior to start time
    at GN/SN or 8 hours at RN/PN/state level, no points will be given
    for that session.
    #8. If a session is cancelled prior to start time, competitors will
    receive refund of paid entry fees, but no other compensation.

    With that said, if the event isn’t canceled within the time period described in #7 then you do have to travel to the event with your pulling vehicle and check in so the entry personnel can record your entry in order to receive rain points. The entry trailer must remain open until scheduled start time of the event in order for you to “check in”.

    As to “Why do I have to take my pulling vehicle with me?” page 81 under Event Procedures and Requirements #4 reads:

    #4. Vehicle must be present on the ground in running order and
    ready to compete before being allowed to enter.

    Light Pro/Limited Pro Stock Turbo

    Question:

    Richwine,

    When the rule says exhaust limit 4.5 inch and the wheel must proturde .125 inch into the bore, will the nut count? Its part of the wheel. Or if I have a couple of little fins in front of the regular wheel will they count? 


    Answer:
    No, the nut doesnt count. The rule says

    1. Turbo limited to 4.5 inch diameter exhaust to be measured at the face of the wheel.
    2. Exhaust wheel tips of wheel (each blade/fin, nut does not count) must protrude into the 4.5 inch bore by 0.125” minimum.
    3. All exhaust must exit the 4.5 inch bore.
      We are going to measure the turbo just like we have on the Super Farm class's 3 inch bore since the days when we "sealed" the turbo with a lead seal.

    If we question how deep it goes into the bore you will be required to disassemble your turbo so we can measure it.

    I included a picture of how / where we will measure the wheel


    turbo exhaust

    Hot Farm tires

    Question:

    Mr. Larry,
    Can I run my 24.5 tires in the Hot Farm class? I dont want to buy 20.8's but, my tractor fits the hot farm class all but tires.
    If not, WHY not.

    Answer:

    No, you can't run the 24.5 tires in the Hot farm class. The reason is that the class needs to and does look different than all the other classes from the grandstand.
    You will be surprised how good your tractor hooks up with 20.8 tires on it.

    Expired Roll Cage Sticker

    Quesion:
    Can I run my tractor with an expired roll cage sticker?
    Answer: 
    Yes as long as the old sticker is still in place. The Techs know (becuase they have been told in tech school) that you can run until you find one of the roll cage inspectors.

    Hitch Question

    Question:

    Mr. Richwine,

    What’s the deal with the new “V” hitch I’ve heard about for Mini rods? Are they legal? Are they gona be allowed in all classes? Asking for a friend.

    Answer:

    No, they aren’t legal the rulebook states in general rules as well as some class rules that nothing can obstruct the chain or the hooking or unhooking of it. The “V” cut design not only would cause difficulty in hooking (if not straight with the sled) but would also make unhooking harder than it already is. Also, when the hook tries to go from side to side when the vehicle gets sideways it will affect the angle of the hook and change the draft of the chain.

    The cross sectional thickness of the point of hook is also spelled out in the rulebook for all classes. This too can affect the hook and the draft of the chain.
    Drawbar Design

    Tech School

    Question:

    Mr. Richwine,
    Can anyone attend the tech school or do you have to be one of the "Click" to attend??

    Answer:

    The school is open for anyone to set in on but, in order to take the test and become a NTPA licensed official you must be endorsed by either a NTPA member state or by the NTPA itself.

    New SF turbo 3"charger

    Question:

    Mr. Richwine,

    I hear that Hart has a new 3" charger that measures a fuzz over 3 inches.It was allowed to run last weekend in NC at a non NTPA event. Will that be allowed to run at a UPOC event? If so what's the limit?

    Answer:

    I heard about the new turbo and have had a couple of calls already. I can assure you that NTPA won't allow that and if they are found to be on a tractor at a NTPA event, they won't be allowed to run or if they are found to have run after the fact the tractor will be DQ'd.As luck would have it, I will be at Pinetops and Benson and will make sure the SF chargers are checked.

    Mounting OEM Rollcage

    Question:

    Hey Richwine,
    I’m new to NTPA and I can’t find the rollcage mounting spec anywhere in the rulebook. I have a D-21 and need to mount an AccuFeed cage to it. Where is it and what do I need to do?

    Answer:

    The Rollcage spec is a SFI 47.1, that’s all that’s listed in the book. The mounting to a OEM chassis is as follows:

    Mounting must use at least 3 axle housing bolts on each side as well as 1 bolt before and after the axle housing. There bolts must be in sheer (horizontal ) with a total of 2 9/16” bolt material. 
    mounting cage

    Rollcage Webbing

    Question:
    Mr. Richwine,

    I am building a Mini Rod and have a question about the webbing between the upright tubes? Can they be lightened? If so, how much? I have included a photo of the chassis that is available and they look like they have been lightened a lot.
    webbing

    Answer:
    Yes the shear webbing that goes between the up tubes can be lightened by 40%.
    The Spec says: shear web may have lightening holes but must retain 60% material and must have a minimum of 1 inch around the perimeter of the web on all four sides. This applies to both Mini Rods and Big Tractor rollcages.
    After looking at the photo you are correct this will not pass the SFI / NTPA inspection and will have to be corrected before they are allowed to compete with NTPA.

    Rollcage Inspection Cost

    Question:

    Mr. Richwine,
    I'm not a member of NTPA but, would like to run at the upcoming event. I need to get my cage inspected, is there a charge for that?

    Answer:
    Here's the program that's been in place since 1999 when the cage was implemented.
    All vehicles that compete at a NTPA event must have the rollcage inspected and display a NTPA/SFI certification sticker or the vehicle will not be allowed to hook.

    1. Upon passing inspection and paying the fee of $75.00 per cage to NTPA on vehicles that have a paid NTPA membership. The rollcage will have a certification sticker applied to it that denotes the inspection date, it will be valid for a period of five (5) years before being required to have their rollcage reinspected. Unless an accident occurs that involves the rollcage.
    2. A service fee of $100.00 will be added to a cage that is on a non NTPA member vehicle. This $100.00 fee will be applied to a regular membership (not per hook) if the vehicle joins NTPA within a 60 day period from the date of inspection.

Contact Info

ADDRESS:
National Tractor Pullers Association
6155-B Huntley Road,
Columbus, OH 43229


PHONE: (614) 436-1761

FAX: (614) 436-0964